diff --git a/usr.sbin/fstyp/fstyp.c b/usr.sbin/fstyp/fstyp.c
index 63ebb22c39d5..6f6c73f32b1c 100644
--- a/usr.sbin/fstyp/fstyp.c
+++ b/usr.sbin/fstyp/fstyp.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: fstyp.c,v 1.8 2020/01/01 08:56:41 tkusumi Exp $	*/
+/*	$NetBSD: fstyp.c,v 1.9 2020/01/01 09:08:52 tkusumi Exp $	*/
 
 /*-
  * Copyright (c) 2017 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
  *
  */
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: fstyp.c,v 1.8 2020/01/01 08:56:41 tkusumi Exp $");
+__RCSID("$NetBSD: fstyp.c,v 1.9 2020/01/01 09:08:52 tkusumi Exp $");
 
 #include <sys/disklabel.h>
 #include <sys/dkio.h>
@@ -88,8 +88,9 @@ static struct {
 	const char	*name;
 	fsvtyp_function	function;
 	bool		unmountable;
+	const char	*precache_encoding;
 } fsvtypes[] = {
-	{ NULL, NULL, NULL }
+	{ NULL, NULL, NULL, NULL }
 };
 
 void *
diff --git a/usr.sbin/fstyp/fstyp.h b/usr.sbin/fstyp/fstyp.h
index 78df2c556b12..13b510b916c7 100644
--- a/usr.sbin/fstyp/fstyp.h
+++ b/usr.sbin/fstyp/fstyp.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: fstyp.h,v 1.7 2020/01/01 08:56:41 tkusumi Exp $	*/
+/*	$NetBSD: fstyp.h,v 1.8 2020/01/01 09:08:52 tkusumi Exp $	*/
 
 /*-
  * Copyright (c) 2017 The NetBSD Foundation, Inc.
@@ -58,11 +58,11 @@ void	*read_buf(FILE *, off_t, size_t);
 char	*checked_strdup(const char *);
 void	rtrim(char *, size_t);
 
-int	fstyp_apfs(FILE *fp, char *label, size_t size);
+int	fstyp_apfs(FILE *, char *, size_t);
 int	fstyp_cd9660(FILE *, char *, size_t);
-int	fstyp_exfat(FILE *fp, char *label, size_t size);
+int	fstyp_exfat(FILE *, char *, size_t);
 int	fstyp_ext2fs(FILE *, char *, size_t);
-int	fstyp_hfsp(FILE *fp, char *label, size_t size);
+int	fstyp_hfsp(FILE *, char *, size_t);
 int	fstyp_msdosfs(FILE *, char *, size_t);
 int	fstyp_ntfs(FILE *, char *, size_t);
 int	fstyp_ufs(FILE *, char *, size_t);
@@ -72,7 +72,7 @@ int	fstyp_hammer2(FILE *, char *, size_t);
 int	fstyp_zfs(FILE *, char *, size_t);
 #endif
 
-int	fsvtyp_hammer(const char *blkdevs, char *label, size_t size);
-int	fsvtyp_hammer_partial(const char *blkdevs, char *label, size_t size);
+int	fsvtyp_hammer(const char *, char *, size_t);
+int	fsvtyp_hammer_partial(const char *, char *, size_t);
 
 #endif /* !FSTYP_H */